Rocky® Core Waterproof Insulated Outdoor Boots are great for hunting, hiking or working outside. Inside, 800 grams of 3M™ Thinsulate™ Ultra Insulation provides protection from the cold without adding bulk. Rocky Waterproof construction keep your feet dry. Guaranteed. The upper is a combination of full-grain leather and 900-denier nylon for strength and resistance to abrasions. The boots feature Mossy Oak® camouflage.